Thank goodness a Google engineer has spilled the beans!

We are thrilled when an authority divulges just about anything related to Internet search giant Google. But we love it the most when authorities are revealing juicy Google secrets linked to the best search engine ranking strategies.

Recently, the statement of Google Engineer, Dan Crow, Director of Crawl Systems at Google has become a buzzword in the search engine realm.

Dan has this to say:

New "unavailable_after" Tags - These tags will allow webmasters the ability to tell Google when to stop indexing a page at a certain time.

Nosnippet & Noarchive tags - Dan detailed that these tags are not generally recommended, because he says "snippets are extremely helpful to visitors, as is showing the cache". In essence, these tags reduce some problems associated with Google caching and improperly displaying the snippets below the titles in the search results.

Avoid Walled Gardens - Dan said you could put one of the links from that group in a sitemap and Google would index it and follow the other links. I think pointing an external link to those pages would be a much better idea. He added "those pages would be likely to be indexed via the sitemap...but considered low quality since they wouldn't have any PageRank. Google is working on a way to change this in the future."

Quite interesting!